My 990 is hooked to my HTPC via optical out from the motherboard. The HTPC does it all, all my video, whether DVD, TV, recorded TV, or internet video, as well as all my audio, with two hard drives full of music. So, I use only one input(OPT1) on my 990, but the processing needs are different. I have small Onix REF 1 front speakers, Triad Bronze InCeiling surrounds, no center channel(yet), and an SVS PB12-Ultra sub. What would be the best way to switch modes, as the TV is always in 5.1, and when I switch to music, I get a surround mode(with PCM? next to the little speaker picture) which skips my sub, and sounds awful? How best to go from surround to Stereo(fronts + sub) while using the same input? Thanks!

Here's what I do with my DVD player (which serves double-duty as a CD player as well): I have two inputs configured to use the same digital input. The "DVD" input applies Pro Logic IIx processing to Dolby Digital 2.0 and PCM stereo sources as well as Dolby 5.1 and DTS 5.1 sources (Dolby EX and DTS ES of course force those specific decoding modes because of the accompanying flags). The "CD" input applies upsampling to PCM stereo sources. The same player and digital audio connection handles both sources, but I only have to pick "CD" or "DVD" on the remote to have the 990 do what I want it to. Also, be sure the Ref1's are set to "small" to insure that the sub is in the mix for music. That should do the trick for you. You could even set up a third input for TV (live and recorded) using a different set of default processing modes if your needs in those cases differed from your DVD surround mode needs.